class HScrollbar
{
  int swidth, sheight;    // width and height of bar
  int xpos, ypos;         // x and y position of bar
  float spos, newspos;    // x position of slider
  int sposMin, sposMax;   // max and min values of slider
  int loose;              // how loose/heavy
  boolean over;           // is the mouse over the slider?
  boolean locked;
  float ratio;
  color overColor;
  String title;
  int maxim; // the maximum that the scrollbar should display



  HScrollbar (){
   this("nameless", 0,0,width, 10, 16,width); 
  }
  HScrollbar (String name, int xp, int yp, int sw, int sh, int l, int top) {
    swidth = sw;
    sheight = sh;
    int widthtoheight = sw - sh;
    ratio = (float)sw / (float)widthtoheight;
    xpos = xp;
    ypos = yp-sheight/2;
    spos = xpos + swidth/2 - sheight/2;
    newspos = spos;
    sposMin = xpos;
    sposMax = xpos + swidth - sheight;
    loose = l;
    textFont(loadFont("CenturyGothic-15.vlw"), 12.0);
    overColor = color(255);
    title=name;
    maxim = top;


  }

  void update() {
    if(over()) {
      over = true;
    } else {
      over = false;
    }
    if(mousePressed && over) {
      locked = true;
    }
    if(!mousePressed) {
      locked = false;
    }
    if(locked) {
      newspos = constrain(mouseX-sheight/2, sposMin, sposMax);
    }
    if(abs(newspos - spos) > 1) {
      spos = spos + (newspos-spos)/loose;
    }
  }

  int constrain(int val, int minv, int maxv) {
    return min(max(val, minv), maxv);
  }

  boolean over() {
    //info("xpos =" + xpos + ", ypos = " + ypos +", swidth = " + swidth);
    
    if(mouseX > xpos && mouseX < xpos+swidth &&
    mouseY > ypos && mouseY < ypos+ (2 * sheight)) {
      return true;
    } else {
      return false;
    }
  }

  void display() {
    //fill(255);
    fill(overColor);
    rect(xpos, ypos, swidth, sheight);
    if(over || locked) {
      fill(153, 102, 0);
    } else {
      fill(102, 102, 102);
    }
    rect(spos, ypos, sheight, sheight);
    fill(0);
    //noStroke();
    rect(xpos,ypos+sheight,swidth, sheight);
    fill(0);
    text(str(getVal()) ,spos + sheight + 3, ypos+sheight);
    fill(255); //lets have a name for the value showing
    text(title,spos,ypos+ (2* sheight));
  }
  
  //get the position as a portion of the max
  float getVal(){
    return spos/swidth * maxim;
  }
  
  

  float getPos() {
    // Convert spos to be values between
    // 0 and the total width of the scrollbar
    return spos * ratio;
  }
}
//balanced bar between max and -max
class BHScrollbar extends HScrollbar{
  BHScrollbar(String name, int xp, int yp, int sw, int sh, int l, int top){
    super(name, xp, yp, sw,sh,l,top);
  }
  float getVal(){
    return (2*(spos - (swidth/2)))/swidth * maxim;
  } 
  
}
//returns a value between 0 and max
class IHScrollbar extends HScrollbar{
  IHScrollbar(String name, int xp, int yp, int sw, int sh, int l, int top){
    super(name, xp, yp, sw,sh,l,top);
  }
  
  float getVal(){
    return floor(spos/swidth * maxim);
  } 
}